Moral of this story: Have the oil changed at the dealer or an independent shop that knows the proper procedure.
The place that replaced my drain plug didn't replace the washer because the guy said that the washer was for the filter. To impress me even further, he was going to use a big pair of channelock adjustable pliers to remove the filter cap! At that point I told him to put in the oil and that I would replace the filter later at home.